Color

#8166ea

#8166ea
hex#8166ea
rgbrgb(129, 102, 234)
hslhsl(252, 76%, 66%)
oklchoklch(0.603 0.191 288.8)
Closest name: mediumslateblue (#7b68ee)Relative luminance 0.2011

Colors that go with #8166ea

Amber, Blue and Deep Sky Blue lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#d0ea66

#668eea · #c366ea

#ea8166 · #66ea81

Split-complementary

Open in tool →

#eac366 · #8eea66

#ea668e · #d0ea66 · #66eac3

Contrast

#8166ea as textRatioAAAA largeAAAFix
Aaon white
4.18:1failpassfail
  • AA: use #795de9 as the text (4.61:1)
  • AAA: use #5431e3 as the text (7.18:1)
  • AA: or shift the background to #0f0f0f (4.58:1)
Aaon black
5.02:1passpassfail
  • AAA: use #9b86ee as the text (7.04:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #8166ea as the background.

Brands using this color

Fonts for this mood

#8166ea reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #8166ea
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #8166ea and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/8166ea-a99cc4-dfb64e-281f2d-e9ecf1?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md